List 3 pathogens that may cause dieseases in plants. How are they transmitted? Mention the methods by which these can be controlled. Statea the harmful effects of these methods.
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Tobacco Mosaic Disease:-
1.It is caused by tobacco mosaic virus.
2.There is no medicine or cure for TMD. The only way to prevent it is by practicing sanitation. Remove unwanted or infected plant which is near it.
Citrus Canker:-
1.It is caused by bacterium Xanthomonas axonopodis.
2.Sanitation, spraying fungicides like Bordeaux mixture and lime-sulphur.
Crown Gall:-
1.It is caused by bacterium Agrobacterium tumefacians.
2.Grow potato plants for next one or two years to completely eliminate the bacteria.
Hope this helps you.
1.It is caused by tobacco mosaic virus.
2.There is no medicine or cure for TMD. The only way to prevent it is by practicing sanitation. Remove unwanted or infected plant which is near it.
Citrus Canker:-
1.It is caused by bacterium Xanthomonas axonopodis.
2.Sanitation, spraying fungicides like Bordeaux mixture and lime-sulphur.
Crown Gall:-
1.It is caused by bacterium Agrobacterium tumefacians.
2.Grow potato plants for next one or two years to completely eliminate the bacteria.
Hope this helps you.
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